A sample of this motor:
[https://www.youtube.com/watch?v=LXBYMiNH1nE](https://www.youtube.com/watch?v=LXBYMiNH1nE)
In: 87
Each magnet pulls the rotor towards itself, so at first a magnet in front of the rotor accelerates it. But for the rotor to rotate further, it needs to move away from the magnet it was just being attracted to again, and that uses about as much energy as the rotor gained from the previous attraction. In sum, nothing is added or gained and you would’ve been better off not using any magnets at all.
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